Products
Silicon carbide refractory brick
Silicon Carbide Refractory Bricks I. Product Types and Classification Standards Oxide-Bonded Type (SC-O): SiC content 70–80%, silicate-bonded phase 15–20%; bulk density 2.5–2.7 g/cm³; service temperature ≤1350°C Nitride-Bonded Type (SC-N): Si₃N₄/Si₂N₂O bonding phase 20–30%; SiC content ≥85%; high-temperature strength (at 1400°C) ≥30 MPa Self-Bonded Type (SC-RB): Recrystallized silicon carbide (SiC ≥99%); apparent porosity ≤15%; thermal conductivity 120 W/(m·K). New Composite Products: Gradient Structure—working face SiC 95% → transition layer 80% → matrix layer 65%; nano-SiC coating (wear resistance improved by 50%). II. Advanced Production Processes Raw Material Processing System: SiC particle size grading (3–1 mm : 1–0.1 mm : <0.1 mm = 4:3:3); surface modification of silicon nitride powder (D50 = 0.8 μm); intelligent forming processes, including isostatic pressing (pressure 200–250 MPa) and 3D printing for precision shaping of complex components; special sintering technologies such as atmosphere-protected sintering (N₂, 1800–2200°C) and spark plasma sintering (SPS), which reduces the sintering cycle by 80%; post-processing techniques including chemical vapor deposition (CVD) for surface densification and laser precision machining with tolerances of ±0.1 mm. III. Core Application Areas in 2026 Industry Applications Typical Components Performance New Energy Lithium-Ion Battery Sintering Furnaces: Roller rods’ service life extended to 5 years Electronic Materials Silicon Carbide Single-Crystal Growth Furnaces: Crucibles—thermal field uniformity improved by 30% Environmental Protection Hazardous Waste Incinerators: Lining—corrosion resistance enhanced by 60% Aerospace Rocket Engine Nozzles: Temperature resistance up to 2000°C IV. Comparative Performance Advantages vs. Traditional Materials Thermal Conductivity: 120 W/(m·K) (high-alumina bricks only 2.1); Wear Resistance: Volumetric wear ≤0.5 cm³ (ASTM C704); Thermal Shock Resistance: 50 cycles (water quenching at 1100°C); Economic Indicators Initial Cost: 40% lower than zirconia-corundum bricks; Maintenance Interval: 8–10 years (traditional materials 3–5 years). V. Physicochemical Specifications (GB/T 2026–SC) 1. Basic Properties (SC-N Type): — Bulk Density: 2.7–2.9 g/cm³ — Apparent Porosity: 12–15% — Cold Crushing Strength: ≥150 MPa High-Temperature Characteristics: — Load Softening Point (0.2 MPa): ≥1650°C — Flexural Strength (at 1400°C): ≥35 MPa Special Properties: — Resistance to Molten Aluminum Erosion: ≤1.2 mm/100 h (at 900°C) — Coefficient of Thermal Expansion: 4.5 × 10⁻⁶/°C (20–1000°C)
Sintered zirconia-alumina brick
Sintered Zirconia–Alumina Refractory Bricks I. Main Product Types Standard Type (AZS-33): ZrO₂ content: 33±2% (stabilized); Al₂O₃: 45–50%; SiO₂ ≤16%; bulk density: 3.8–4.0 g/cm³ High-Density Type (AZS-HD): apparent porosity ≤12% (produced by ultra-high-pressure forming); glass erosion resistance improved by 40%; thermal shock resistance: ≥25 cycles (water quenching at 1100℃). 2025 New Gradient Composite Brick—Sandwich Structure: Working Face: 40% ZrO₂ + α-Al₂O₃ nanolayer; Transition Layer: mullite network structure; Backing Layer: porous corundum. II. Intelligent Production Processes Raw Material Pre-treatment: Plasma decomposition of zircon sand (ZrO₂ purity ≥99.5%); microwave activation of industrial alumina (α-phase conversion rate ≥95%); digital forming—isostatic pressing (300 MPa, ±0.3 mm accuracy); 3D printing of complex-shaped components (minimum wall thickness 3 mm); low-carbon firing technology—hydrogen-fueled tunnel kiln (1750℃ ±5℃); waste-heat power generation system (energy consumption reduced by 30%). III. Core Application Areas Application Industries Typical Components Technical Benefits Optoelectronic Displays High-alumina glass melting furnace—flow channel life 8–10 years New Energy Photovoltaic glass—tin bath energy consumption reduced by 25% Aerospace Rocket engine linings—temperature resistance up to 2200℃ Environmental Hazardous Waste Melting Furnaces—slag resistance improved by 60% IV. Performance Advantages Compared with Traditional Electrofused Bricks Thermal Shock Resistance: 35 cycles vs. 15 cycles Dimensional Accuracy: ±0.2 mm vs. ±1.0 mm Carbon Emissions: 1.2 tCO₂/t vs. 2.8 tCO₂/t Economic Analysis Initial Cost: 40–50% lower than electrofused AZS Maintenance Interval: 7 years without major overhauls V. Latest Physicochemical Specifications 1. Basic Properties (AZS-33): — Refractoriness: ≥1790℃ (GB/T 7322-2025) — Compressive Strength: ≥150 MPa (ISO 10059-2:2026) High-Temperature Characteristics: — Load Softening Point: ≥1700℃ (0.2 MPa) — Glass Erosion Resistance: ≤1.0 mm/24 h (1500℃) Special Indicators: — Thermal Conductivity: 2.3 W/(m·K) (1000℃) — Radioactivity: Internal Radiation Index ≤0.5
Heavy-duty mullite shaped brick
Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa; Composite Reinforced Type (New Technology 2025): Addition of 5–8% nano-ZrO₂, improving thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic Pressing (200–250 MPa); Online X-ray Flaw Detection (100% defect detection rate); Hydrogen-Fired Sintering Technology: Full-Oxygen Combustion Tunnel Kiln (1750°C ±5°C), reducing carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields and Service Locations: Performance Highlights Ceramic Industry: Roller Kiln Supporting Structure—Service Life Extended to 5 Years; Chemical Industry: Ethylene Glycol Reactor Lining—Corrosion Resistance Improved by 40%; New Energy: Lithium-Battery Material Sintering Kiln—Energy Consumption Reduced by 18%; Aerospace: Rocket Exhaust Deflector—Temperature Resistance Up to 1850°C. IV. Performance Advantages Compared with Traditional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (1600°C for 50 hours); Economic Analysis: Initial Cost—50% Lower than Electrofused Mullite Bricks; Maintenance Interval—3 Years Without Major Overhaul (vs. 2 Years for Conventional Bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Room-Temperature Compressive Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali Corrosion Resistance (K₂O): Weight Gain ≤0.8% (1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (2.45 GHz)
Sintered Heavy-Duty Mullite Brick
Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina raw material); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa; Composite Reinforced Type (New Technology 2025): Addition of 5–8% nano-ZrO₂, improving thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic Pressing (200–250 MPa); Online X-ray Nondestructive Testing (100% defect detection rate); Hydrogen-Fired Sintering Technology: Full-Oxygen Combustion Tunnel Kiln (1750°C ±5°C), reducing carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields | Component | Performance Highlights Ceramic Industry | Roller Hearth Kiln | Load-Bearing Structure | Service Life Extended to 5 Years Chemical Industry | Ethylene Glycol Reactor Lining | Corrosion Resistance Improved by 40% New Energy | Lithium-Ion Battery Material Sintering Kiln | Energy Consumption Reduced by 18% Aerospace | Rocket Exhaust Deflector | Temperature Resistance Up to 1850°C IV. Performance Advantages Compared with Traditional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (1600°C for 50 hours); Economic Analysis: Initial Cost: 50% lower than electrofused mullite bricks; Maintenance Interval: 3 years without major overhauls (vs. 2 years for traditional bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Cold Crushing Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali Resistance (K₂O): Weight Gain ≤0.8% (1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (2.45 GHz)
Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa. Composite Reinforced Type (New Technology 2025): Incorporation of 5–8% nano-ZrO₂, enhancing thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic pressing at 200–250 MPa; Online X-ray Nondestructive Testing (100% defect detection rate); Hydrogen-fueled firing technology using full-oxygen combustion in a tunnel kiln (1750°C ±5°C), reducing the carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields and Service Locations: Performance Highlights— Ceramic Industry: Roller Kiln load-bearing structure lifespan extended to 5 years; Chemical Industry: Ethylene glycol reactor lining exhibits 40% improved erosion resistance; New Energy: Lithium-ion battery material sintering kiln energy consumption reduced by 18%; Aerospace: Rocket exhaust nozzle shroud withstands temperatures up to 1850°C. IV. Performance Advantages Compared with Conventional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (at 1600°C for 50 hours); Economic Analysis: Initial Cost: 50% lower than electrofused mullite bricks; Maintenance Interval: 3 years without major overhauls (compared with 2 years for conventional bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Room-Temperature Compressive Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali-Erosion Resistance (K₂O): Weight Gain ≤0.8% (at 1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (at 2.45 GHz)
Magnesia Refractory Bricks I. Main Product Types Magnesia Bricks (MZ Series): Composition: MgO ≥ 90%, CaO ≤ 2.5%; Properties: Refractoriness ≥ 2000°C, thermal shock resistance 15–25 cycles; Bulk density: 2.8–3.0 g/cm³. Magnesia–Carbon Bricks (MT Series): Composite composition: MgO 60–80%, C 10–20%; Special process: addition of antioxidant (Al/Si alloy); High-temperature strength: flexural strength at 1600°C ≥ 15 MPa. Magnesia–Alumina Bricks (MA Series): Composition ratio: MgO 70–85%, Al₂O₃ 10–20%; Thermal shock resistance: ≥ 30 cycles (water quenching at 1100°C). II. Modern Production Processes Raw Material Processing System: Electrofused magnesia sand grading (grades 97, 98, and 99); Intelligent ore blending (MgO variation ≤ 0.3%); Composite bonding technology with organic binders: phenolic resin + pitch; Inorganic binders: magnesium sulfate + phosphates; Intelligent firing control in ultra-high-temperature tunnel kilns (1850–1950°C); Firing curve: # Optimized firing program if temperature < 800°C: heating rate 60°C/h; elif 800–1600°C: controlled reducing atmosphere; else: constant-temperature stage with ±5°C accuracy. III. Core Applications Application Fields Typical Equipment Technical Benefits Steel metallurgy converter lining life ≥ 5000 heats; Nonferrous metals—copper flash smelting furnace slag erosion resistance improved by 40%; Environmental protection and energy—waste incineration furnace alkali corrosion resistance ≥ 2 years; Building materials industry—cement rotary kiln transition zone thermal shock stability 35 cycles. IV. Performance Advantages Compared with Traditional Materials Refractoriness: 2000°C vs. high-alumina brick 1790°C; Slag resistance: R₂O erosion rate reduced by 60%; High-temperature strength: 1600°C, compressive strength retention ≥ 80%; Economic Benefit Analysis Initial cost: 50–60% lower than chrome-corundum bricks; Consumption per ton of steel: 0.8–1.2 kg/t (converter application). V. Latest Physicochemical Specifications (GB/T 2026-MG) 1. Basic Properties: – Bulk density: 2.9–3.2 g/cm³ (MT series); – Apparent porosity: ≤ 16% (MA series). High-Temperature Characteristics: – Load-softening temperature: ≥ 1700°C (0.2 MPa); – Slag resistance (CaO/SiO₂ = 3): ≤ 1.2 mm/24 h. Special Indicators: – Oxidation resistance (1400°C/5 h): weight gain ≤ 1.5%; – Hydration resistance: wet-heat test ≥ 95%.
Direct-bonded magnesia-chrome brick
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C). Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Resistance to alkali erosion improved by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Copper-smelting furnace slag line—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Cement kiln transition zone—thermal consumption reduced by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Glass-furnace heat-storage chamber—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|------------------------|------------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free product); - Heat recovery rate: ≥75% (recycling of waste bricks).
Magnesia-chrome refractory brick
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C) Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Copper-smelting furnace slag line—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Cement kiln transition zone—thermal consumption reduced by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Glass-furnace regenerator—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|-----------------------|-----------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free product); - Heat recovery rate: ≥75% (recycling of waste bricks).
Magnesia iron spinel brick is a high-performance chrome-free basic refractory material developed by Zhengzhou Jinshan Refractory. It is produced using high-purity magnesia and pre-synthesized magnesia-iron spinel as main raw materials. This product offers outstanding kiln coating formation, strong thermal shock resistance, and excellent corrosion resistance against cement clinker and alkali salts.
It serves as an ideal chrome-free alternative to traditional magnesia-chrome bricks, particularly suitable for the burning zone of cement rotary kilns. Jinshan magnesia iron spinel bricks provide superior coating adhesion while maintaining structural integrity under high thermochemical loads, effectively extending service life and reducing environmental impact.
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C). Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤ 1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Slag line in copper smelting furnaces—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Transition zone in cement kilns—reduced thermal consumption by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Heat-storage chamber in glass furnaces—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|------------------------|------------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free products); - Heat recovery rate: ≥75% (recycling of waste bricks).
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C) Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Precision finishing of dimensions (tolerance ±0.3 mm). Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Slag line in copper smelting furnaces—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Cement kilns—transition zone; Heat consumption reduced by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Glass furnaces—heat-storage chambers; Maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|-----------------------|-----------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free products); - Heat recovery rate: ≥75% (recycling of waste bricks).
Magnesium Alumina Spinel Brick
Magnesium alumina spinel brick is a high-performance composite basic refractory material independently developed by Zhengzhou Jinshan Refractory. It is made from high-purity magnesia and pre-synthesized magnesia-alumina spinel. The product combines excellent thermal shock resistance, high refractoriness under load, and strong chemical corrosion resistance. It is especially suitable for transition zones, burning zones of cement rotary kilns, and other high-temperature areas in the steel industry.
Compared with traditional magnesia bricks, Jinshan magnesia alumina spinel bricks offer significantly improved thermal shock stability and coating adhesion, effectively extending kiln lining life and reducing overall refractory costs.
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